CN106652903A - OLED pixel circuit, driving method of OLED pixel circuit and display device - Google Patents
OLED pixel circuit, driving method of OLED pixel circuit and display device Download PDFInfo
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- CN106652903A CN106652903A CN201710124211.XA CN201710124211A CN106652903A CN 106652903 A CN106652903 A CN 106652903A CN 201710124211 A CN201710124211 A CN 201710124211A CN 106652903 A CN106652903 A CN 106652903A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0278—Details of driving circuits arranged to drive both scan and data electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
- G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/026—Arrangements or methods related to booting a display
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of El Displays (AREA)
Abstract
The invention relates to the technical field of display, and in particular relates to an OLED pixel circuit, a driving method of the OLED pixel circuit and a display device. The phenomenon of screen splashing when a display panel is started up or the sleeping is awakened can be eliminated. The OLED pixel circuit comprises an initialization module, a data write-in and compensation module, a driver module and a light-emitting control module, wherein the initialization module is respectively connected to the driver module, a first signal end, a first voltage end and an initial voltage end, and is used for initializing the driver module; the data write-in and compensation module is respectively connected to the driver module, a scanning signal end and a data voltage end, and is used for carrying out compensation of threshold voltage on the driver module; the driver module is further connected to the light-emitting control module and the first voltage end, and is used for driving a light-emitting module to emit light after the compensation of the threshold voltage is obtained; and the light-emitting control module is further connected to the light-emitting module, an enable signal end, a second voltage end, a second signal end and a third voltage end, and is used for turning on or turning off the light-emitting module under the control of the enable signal end, the second voltage end, the second signal end and the third voltage end.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of OLED pixel circuit and its driving method, display device.
Background technology
Organic electroluminescent LED (Organic Light Emitting Diode, OLED) display is research at present
One of the focus in field, compares with liquid crystal display (Liquid Crystal Display, LCD), and OLED has low energy consumption, life
The advantages of producing low cost, self-luminous, wide viewing angle and fast corresponding speed.Wherein, pixel circuit design is OLED display core skill
Art content, with important Research Significance.
The viewing area of display floater includes multiple OLED pixel circuits, due to when the first frame picture shows, each OLED
The circuit of image element circuit is unstable, causes the opening degree heterogeneity of driving transistor in each OLED pixel circuit, so as to lead
Cause Jing driving transistors to flow to the size also heterogeneity of the electric current of luminescent device, so as to cause display floater occur start splashette,
The problems such as sleep awakening splashette.
The content of the invention
Embodiments of the invention provide a kind of OLED pixel circuit and its driving method, display device, can eliminate display surface
The phenomenons such as plate start splashette, sleep awakening splashette.
To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：
A kind of first aspect, there is provided OLED pixel circuit, including：It is initialization module, data write and compensating module, luminous
Control module, drive module and light emitting module；The initialization module, connects respectively the drive module, the first signal
End, first voltage end and initial voltage end, at first signal end, the initial voltage end and described first
Under the control of voltage end, the drive module is initialized；The data write and compensating module, connect respectively the drive
Dynamic model block, scanning signal end and data voltage end, under the control at the scanning signal end, by data electricity
The signal of pressure side input, to the drive module compensation of threshold voltage is carried out；The drive module, is also connected with the luminous control
Molding block and the first voltage end, for after the compensation for obtaining threshold voltage, at the first voltage end and described
Under the control of light emitting control module, the light emitting module is driven to be lighted；The light emitting control module, is also connected with described luminous
Module, signal end, second voltage end, secondary signal end and tertiary voltage end are enabled, for enabling signal end, second electric
Under the control of pressure side, secondary signal end and tertiary voltage end, it is turned on and off the light emitting module.
Preferably, the drive module includes storage capacitance and driving transistor；The first end connection of the storage capacitance
The initialization module, data write and compensating module and the light emitting control module, the second end connects the driving
The grid of transistor；First pole of the driving transistor connects the first voltage end, and the second pole connects the light emitting control
Module and data write and compensating module.
Preferably, the initialization module includes the first transistor and transistor seconds；The grid of the first transistor
Connect first signal end, the first pole connects the first voltage end, and the second pole connects the first end of the storage capacitance；Institute
The grid for stating transistor seconds connects first signal end, and the first pole connects the initial voltage end, and the connection of the second pole is described
Second end of storage capacitance.
Preferably, the data write includes third transistor and the 4th transistor with compensating module；3rd crystal
The grid of pipe connects the scanning signal end, and the first pole connects the data voltage end, and the second pole connects the storage capacitance
First end；The grid of the 4th transistor connects the scanning signal end, and the first pole connects the second of the driving transistor
Pole, the second pole connects the second end of the storage capacitance.
Preferably, the light emitting control module includes the 5th transistor, the 6th transistor and the 7th transistor；Described 5th
The grid of transistor connects the enable signal end, and the first pole connects the second voltage end, the second pole connection storage electricity
The first end of appearance；The grid of the 6th transistor connects the enable signal end, and the first pole connects the driving transistor
Second pole, the second pole connects the light emitting module；The grid of the 7th transistor connects the secondary signal end, and the first pole connects
The tertiary voltage end is connect, the second pole connects the light emitting module.
Preferably, the light emitting module includes luminescent device；The anode of the luminescent device connects the 6th transistor
The second pole, negative electrode connects the second pole of the 7th transistor.
A kind of second aspect, there is provided display device, including the OLED pixel circuit described in first aspect.
The third aspect, there is provided a kind of driving method of OLED pixel circuit, the driving method includes：In the initial of a frame
Change stage, initialization module enters under the control of the first signal end, first voltage end and initial voltage end to drive module
Row initialization；Data write and compensated stage in a frame, data write under the control at scanning signal end, is led to compensating module
The signal of data voltage end input is crossed, the compensation of threshold voltage is carried out to the drive module；In the first frame to nth frame, often
The glow phase of one frame, light emitting control module is enabling signal end, second voltage end, secondary signal end and tertiary voltage end
Control under, control light emitting module close；The glow phase of each frame after nth frame, the light emitting control module is in institute
Under stating the control for enabling signal end, the second voltage end, the secondary signal end and the tertiary voltage end, institute is controlled
State light emitting module unlatching；Wherein, N is integer, and 1≤N≤5.
Preferably, N is equal to 2.
Preferably, the initialization module includes the first transistor and transistor seconds；In the initial phase of a frame, institute
The first signal end input initialization signal is stated, control the first transistor and transistor seconds are opened, the drive module is carried out
Initialization.
Preferably, the data write includes third transistor and the 4th transistor with compensating module；In the data of a frame
Write and compensated stage, the scanning signal end is input into scanning signal, and control third transistor and the 4th transistor are opened, to institute
Stating drive module carries out the compensation of threshold voltage.
Preferably, the light emitting control module includes the 5th transistor, the 6th transistor and the 7th transistor；In the first frame
To in nth frame, the glow phase of each frame enables signal end input and enables signal, the 5th transistor of control and the 6th transistor
Open, secondary signal end is input into the first signal and controls the 7th transistor cutoff, control the light emitting module and close；Nth frame with
The glow phase of each frame afterwards, enables signal end input and enables signal, and the 5th transistor of control and the 6th transistor are opened, the
Binary signal end input secondary signal controls the 7th transistor and opens, and controls the light emitting module and opens.
The embodiment of the present invention provides a kind of OLED pixel circuit and its driving method, display device, using light emitting control mould
Block to light emitting module be turned on and off be controlled, specifically, show just start when, the circuit in OLED pixel circuit is not
Stable, light emitting control module control light emitting module is closed, and after several frames, after circuit stability in OLED pixel circuit, is lighted
Control module control light emitting module is opened.So, when light emitting module is opened, the circuit in OLED pixel circuit compared with
It is stable, now the opening degree of the multiple driving transistors in OLED pixel circuit is more homogeneous so that Jing driving transistors
The size for flowing to the electric current of luminescent device is more homogeneous, splashette phenomenon occurs so as to can well avoid display floater.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of OLED pixel circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of concrete structure schematic diagram of the modules of OLED pixel circuit shown in Fig. 1；
The sequential chart of each signal that Fig. 3 is adopted when being for driving the OLED pixel circuit shown in Fig. 2；
Equivalent circuit diagram when Fig. 4-7 is the OLED pixel circuit correspondence different situations shown in Fig. 2；
Fig. 8 is a kind of OLED pixel circuit driving method schematic flow sheet provided in an embodiment of the present invention.
Reference
10- initialization modules；20- data write and compensating module；30- light emitting control modules；40- drive modules；50- sends out
Optical module.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
The embodiment of the present invention provides a kind of OLED pixel circuit, as shown in figure 1, including：Initialization module 10, data writes
With compensating module 20, light emitting control module 30, drive module 40 and light emitting module 50.
Specifically, initialization module 10, respectively connect drive module 40, the first signal end S1, first voltage end V1 and
Initial voltage end Vinit, under the control of the first signal end S1, initial voltage end Vinit and first voltage end V1,
Drive module 40 is initialized.
Data write and compensating module 20, and drive module 40, scanning signal end S3 and data voltage end are connected respectively
Vdata, under the control of scanning signal end S3, the signal being input into by data voltage end Vdata to be entered to drive module 40
The compensation of row threshold voltage.
Drive module 40, is also connected with light emitting control module 30 and first voltage end V1, for obtaining threshold voltage
After compensation, under the control of first voltage end V1 and light emitting control module 30, driven for emitting lights module 50 is lighted.
Light emitting control module 30, is also connected with light emitting module 50, enables signal end EM, second voltage end V2, secondary signal end
S2 and tertiary voltage end V3, for enabling signal end EM, second voltage end V2, secondary signal end S2 and tertiary voltage
Under the V3 controls of end, it is turned on and off light emitting module 50.
The embodiment of the present invention provides a kind of OLED pixel circuit, using unlatching of the light emitting control module 30 to light emitting module 50
Or closing is controlled, specifically, when display just starts, the circuit in OLED pixel circuit is unstable, light emitting control module
30 control light emitting modules 50 are closed, and after several frames, after circuit stability in OLED pixel circuit, light emitting control module 30 is controlled
Light emitting module 50 is opened.So, when light emitting module 50 is opened, the circuit in OLED pixel circuit is relatively stable,
Now the opening degree of the multiple driving transistors in OLED pixel circuit is more homogeneous so that Jing driving transistors flow direction is luminous
The size of the electric current of device is more homogeneous, splashette phenomenon occurs so as to can well avoid display floater.
It is further specific, as shown in Fig. 2 drive module 40 includes storage capacitance Cst and driving transistor Td.
The write of first end connection initialization module 10, data and compensating module 20 and the light emitting control of storage capacitance Cst
Module 30, the second end connects the grid of driving transistor Td；
The first pole connection first voltage end V1 of driving transistor Td, the second pole connects light emitting control module 30 and number
According to write and compensating module 20.
It should be noted that the drive module 40 can also include multiple driving transistors Td in parallel.It is above-mentioned only
It is the illustration to drive module 40, this is no longer going to repeat them with the function identical structure of drive module 40 for other, but
Protection scope of the present invention should all be belonged to.
As shown in Fig. 2 initialization module 10 includes the first transistor T1 and transistor seconds T2.
The grid of the first transistor T1 connects the first signal end S1, the first pole connection first voltage end V1, the connection of the second pole
The first end of storage capacitance Cst.
The grid of transistor seconds T2 connects the first signal end S1, the first pole connection initial voltage end Vinit, and the second pole connects
Connect the second end of storage capacitance Cst.
It should be noted that the initialization module 10 can also include that the multiple switch in parallel with the first transistor T1 is brilliant
Body pipe, and/or the multiple switch transistor in parallel with transistor seconds T2.Above-mentioned is only illustrating to initialization module 10
Bright, this is no longer going to repeat them with the function identical structure of initialization module 10 for other, but should all belong to the protection of the present invention
Scope.
As shown in Fig. 2 data write includes third transistor T3 and the 4th transistor T4 with compensating module 20.
The grid connection scanning signal end S3 of third transistor T3, the first pole connection data voltage end Vdata, the second pole connects
Connect the first end of storage capacitance Cst.
The grid connection scanning signal end S3 of the 4th transistor T4, the first pole connects the second pole of driving transistor Td, the
Two poles connect the second end of storage capacitance Cst.
It should be noted that the data write can also include with compensating module 20 it is in parallel with third transistor T3 many
Individual switching transistor, and/or the multiple switch transistor in parallel with the 4th transistor T4.Above-mentioned is only data to be write and is mended
The illustration of module 20 is repaid, this is no longer going to repeat them with the function identical structure of compensating module 20 with data write for other,
But should all belong to protection scope of the present invention.
As shown in Fig. 2 light emitting control module 30 includes the 5th transistor T5, the 6th transistor T6 and the 7th transistor T7.
The grid connection of the 5th transistor T5 enables signal end EM, the first pole connection second voltage end V2, the connection of the second pole
The first end of storage capacitance Cst.
The grid connection of the 6th transistor T6 enables signal end EM, and the first pole connects the second pole of driving transistor Td, the
Two poles connect light emitting module 50.
The grid connection secondary signal end S2 of the 7th transistor T7, the first pole connection tertiary voltage end V3, the second pole connects
Sending and receiving optical module 50.
It should be noted that the light emitting control module 30 can also include the multiple switch in parallel with the 5th transistor T5
Transistor, and/or the multiple switch transistor in parallel with the 6th transistor T6, and/or in parallel with the 7th transistor T7 multiple
Switching transistor.Above-mentioned is only the illustration to light emitting control module 30, and other are same with the function phase of light emitting control module 30
Structure this is no longer going to repeat them, but should all belong to protection scope of the present invention.
As shown in Fig. 2 light emitting module 50 includes luminescent device L, the anode of luminescent device L connects the of the 6th transistor T6
Two poles, negative electrode connects second pole of the 7th transistor T7.
Based on the above-mentioned description to each module physical circuit, below in conjunction with Fig. 2 and Fig. 3 to above-mentioned OLED pixel drive circuit
Concrete driving process be described in detail.
It should be noted that the first, embodiment of the present invention is not done to the type of the transistor in modules and unit
Limit, i.e., above-mentioned driving transistor Td, the first transistor T1, transistor seconds T2, third transistor T3, the 4th transistor T4,
5th transistor T5, the 6th transistor T6 and the 7th transistor T7 can be for N-type transistor or P-type transistor.This
Bright following examples are the explanations carried out so that above-mentioned transistor is P-type transistor as an example.
Wherein, the first of above-mentioned transistor extremely can be drain electrode, second extremely can be source electrode；Or, first extremely can be
Source electrode, second extremely can be drain electrodes.The embodiment of the present invention is not restricted to this.
Additionally, according to the difference of transistor conductivity mode, the transistor in above-mentioned image element circuit can be divided into into enhancement mode
Transistor and depletion mode transistor.The embodiment of the present invention is not restricted to this.
Secondth, the embodiment of the present invention is the tertiary voltage end V2 input low levels with first voltage end V1 input high levels,
Or between the explanation that will be carried out as a example by the V2 groundings of second voltage end, also, the high and low voltage for only representing input here
Relative size relation.
As shown in figure 3, each frame of the OLED pixel circuit shows that process can be divided into initial phase P1, data write
With compensated stage P2 and glow phase P3.In Fig. 3 in the magnitude of voltage of glow phase P3 secondary signal end S2, heavy line represents
The oscillogram of the secondary signal end S2 of each frame in 1-N frames, fine line represents the secondary signal end S2 of the later each frame of nth frame
Oscillogram.Specifically：
Reseting stage P1, the first signal end S1 input low level open signals, secondary signal end S2, enable signal end EM with
And scanning signal end S3 input high level pick-off signals, based on this, the equivalent circuit diagram of the OLED pixel circuit shown in Fig. 2 is as schemed
Shown in 4, the first transistor T1 and transistor seconds T2 are turned on, third transistor T3, the 4th transistor T4, the 5th transistor T5,
6th transistor T6, the 7th transistor T7 and driving transistor Td are turned off, and (are in the transistor of cut-off state to play "×" table
Show).
Wherein, the first transistor T1 conductings, the voltage of initial voltage end Vini is written to the second end of storage capacitance Cst；
Transistor seconds T2 is turned on, and the voltage of first voltage end V1 is written to the first end of storage capacitance Cst, to storage capacitance Cst two
The voltage at end is initialized.Herein, the voltage of initial voltage end Vini should be higher than that the cut-in voltage of driving transistor Td, originally
The voltage of beginning voltage end Vini is written to behind the second end of storage capacitance Cst, and driving transistor Td should keep cut-off state.
Data write phase P2, scanning signal end S3 input low level open signals, the first signal end S1, secondary signal end
S2 and enable signal end EM input high level pick-off signals, based on this, the equivalent circuit diagram of the OLED pixel circuit shown in Fig. 2
As shown in figure 5, third transistor T3, the 4th transistor T4 and driving transistor Td are opened, the first transistor T1, the second crystal
Pipe T2, the 5th transistor T5, the 6th transistor T6 and the 7th transistor T7 are turned off.
Wherein, third transistor T3 conducting, the voltage of data voltage end Vdata is written to the first end of storage capacitance Cst,
The voltage of the first end of storage capacitance Cst is changed into Vdata from V1, and variable quantity is Δ V1=V1-Vdata, based on this, storage capacitance
The voltage at second end of Cst is changed into Vini- Δ V1, now, voltage control driving transistor Td at the second end of storage capacitance Cst
Open.When driving transistor Td and the 4th transistor T4 are both turned on, voltage Jing driving transistors Td of first voltage end V1 and
4th transistor T4 is written to the second end of storage capacitance Cst, due to there is threshold voltage vt h in driving transistor Td, therefore
Now the voltage at the second end of storage capacitance Cst is changed into V1+Vth, and the voltage at the second end of storage capacitance Cst rises, higher than control
The cut-in voltage of driving transistor Td processed, control driving transistor Td cut-off.
Glow phase P3, the glow phase (N is the positive integer more than or equal to 1) of the first frame to nth frame enables signal end EM
Input low level open signal, the first signal end S1, secondary signal end S2 and scanning signal end S3 input high level cut-off letters
Number, based on this, the equivalent circuit diagram of the OLED pixel circuit shown in Fig. 2 is as shown in fig. 6, the 5th transistor T5, the 6th transistor
T6 and driving transistor Td are opened, the first transistor T1, transistor seconds T2, third transistor T3, the 4th transistor T4 and
7th transistor T7 is turned off.
Wherein, the 5th transistor T5 conductings, the voltage of second voltage end V2 is written to the first end of storage capacitance Cst, deposits
Storing up electricity holds the voltage of Cst first ends and is changed into V2 from Vdata, and variable quantity is Δ V2=Vdata-V2, based on this, storage capacitance Cst
The voltage at the second end be changed into V1+Vth- Δ V2=V1+Vth-Vdata+V2, now, the voltage at the second end of storage capacitance Cst
Reduce, control driving transistor Td is opened.When driving transistor Td and the 6th transistor T6 are both turned on, first voltage end V1's
Voltage Jing driving transistors Td and the 6th transistor T6 are written to the anode of luminescent device L.But due to the 7th transistor T7 cut-offs,
The voltage of tertiary voltage end V3 cannot be written to the negative electrode of luminescent device L, and now luminescent device L is remained turned-off.
The glow phase of the later each frame of N+1 frames, enables signal end EM and secondary signal end S2 input low levels are opened
Open signal, the first signal end S1 and scanning signal end S3 input high level pick-off signals, based on this, the OLED pictures shown in Fig. 2
The equivalent circuit diagram of plain circuit is as shown in fig. 7, the 5th transistor T5, the 6th transistor T6, the 7th transistor T7 and driving crystal
Pipe Td is opened, and the first transistor T1, transistor seconds T2, third transistor T3 and the 4th transistor T4 are turned off.
Wherein, the 5th transistor T5 conductings, the voltage of second voltage end V2 is written to the first end of storage capacitance Cst, deposits
Storing up electricity holds the voltage of Cst first ends and is changed into V2 from Vdata, and variable quantity is Δ V2=Vdata-V2, based on this, storage capacitance Cst
The voltage at the second end be changed into V1+Vth- Δ V2=V1+Vth-Vdata+V2, now, the voltage at the second end of storage capacitance Cst
Reduce, control driving transistor Td is opened.When driving transistor Td and the 6th transistor T6 are both turned on, first voltage end V1's
Voltage Jing driving transistors Td and the 6th transistor T6 are written to the anode of luminescent device L.7th transistor T7 is turned on, and the 3rd is electric
The voltage of pressure side V3 is written to the negative electrode of luminescent device L, and now luminescent device L unlatchings carry out picture and show.
In glow phase P3, after driving transistor Td is opened, when the gate source voltage Vgs of driving transistor Td deducts drive
When the value that the threshold voltage vt h of dynamic transistor Td is obtained is less than or equal to the drain source voltage Vds of driving transistor Td, i.e. Vgs-Vth
During≤Vds, driving transistor Td is at saturation opening, and driving current I for then flowing through driving transistor Td is：
Wherein, K=W/L × C × u, W/L are the breadth length ratio of driving transistor Td, and C is raceway groove capacitive dielectric layer, and u is raceway groove
Carrier mobility.
Above-mentioned parameter is only relevant with driving transistor Td structure, therefore, flow through the electric current and data of driving transistor Td
The data voltage for realizing display of voltage end Vdata outputs is relevant with the voltage that second voltage end V2 is exported, brilliant with driving
The threshold voltage vt h of body pipe Td is unrelated, so as to eliminate the threshold voltage vt h of driving transistor Td to luminescent device L luminances
The impact of degree, improves the homogeneity of luminescent device L brightness.
The embodiment of the present invention also provides a kind of display device, including above-mentioned OLED pixel circuit.
The embodiment of the present invention provides a kind of display device, including any one pixel-driving circuit as above.It is described
Display device can include multiple pixel unit arrays, and each pixel cell includes any one pixel driver as above
Circuit.Display device provided in an embodiment of the present invention has the pixel-driving circuit identical provided with present invention
Beneficial effect, because pixel-driving circuit has been carried out describing in detail in the aforementioned embodiment, here is omitted.
The embodiment of the present invention also provides a kind of driving method of OLED pixel circuit, as shown in figure 8, the driving method bag
Include：
S10, in the initial phase P1 of a frame, initialization module 10 in the first signal end S1, first voltage end V1 and
Under the control of initial voltage end Vinit, drive module 40 is initialized.
S20, the data write in a frame and compensated stage P2, data write is with compensating module 20 scanning signal end S3's
Under control, the signal being input into by data voltage end Vdata carries out the compensation of threshold voltage to drive module 40.
S30, in the first frame to nth frame, glow phase P4 of each frame, light emitting control module 30 enable signal end
Under the control of EM, second voltage end V2, secondary signal end S2 and tertiary voltage end V3, control light emitting module 50 is closed.
The glow phase of S40, each frame after nth frame, light emitting control module 30 is enabling signal end EM, second electric
Under the control of pressure side V2, secondary signal end S2 and tertiary voltage end V3, control light emitting module 50 is opened.
Wherein, N is integer, and 1≤N≤5.
The embodiment of the present invention provides a kind of driving method of OLED pixel circuit, using 30 pairs of luminous moulds of light emitting control module
Being turned on and off of block 50 is controlled, specifically, show just start when, the circuit in OLED pixel circuit is unstable, sends out
The control light emitting module 50 of photocontrol module 30 is closed, after several frames, after circuit stability in OLED pixel circuit, and light emitting control
The control light emitting module 50 of module 30 is opened.So, when light emitting module 50 is opened, the circuit in OLED pixel circuit is
Relatively stable, now the opening degree of the multiple driving transistors in OLED pixel circuit is more homogeneous so that Jing drives crystal
Pipe flow is more homogeneous to the size of the electric current of luminescent device, splashette phenomenon occurs so as to can well avoid display floater.
After in view of two frames, the circuit in OLED pixel circuit is relatively stable, therefore, the embodiment of the present invention is preferred
, N=2.
Preferably, initialization module 10 includes the first transistor T1 and transistor seconds T2.
In the initial phase P1 of a frame, the first signal end S1 input initialization signals, control the first transistor T1 and the
Two-transistor T2 is opened, and drive module 40 is initialized.
Preferably, data write includes third transistor T3 and the 4th transistor T4 with compensating module 20.
Data write and compensated stage P2, scanning signal end S3 input scanning signal in a frame, controls third transistor
T3 and the 4th transistor T4 is opened, and to drive module 40 compensation of threshold voltage is carried out.
Preferably, light emitting control module 30 includes the 5th transistor T5, the 6th transistor T6 and the 7th transistor T7.
In the first frame to nth frame, glow phase P3 of each frame enables signal end EM input and enables signal, control the
Five transistor T5 and the 6th transistor T6 are opened, and secondary signal end S2 is input into the first signal and controls the 7th transistor T7 cut-offs, control
Light emitting module processed 50 is closed.
Glow phase P3 of each frame after nth frame, enables signal end EM inputs and enables signal, controls the 5th crystal
Pipe T5 and the 6th transistor T6 is opened, and S2 input secondary signals in secondary signal end control the 7th transistor T7 and open, and control is luminous
Module 50 is opened.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by the scope of the claims.
Claims (12)
1. a kind of OLED pixel circuit, it is characterised in that include：Initialization module, data write and compensating module, light emitting control
Module, drive module and light emitting module；
The initialization module, connects respectively the drive module, the first signal end, first voltage end and initial voltage end,
For under the control of first signal end, the initial voltage end and the first voltage end, to the drive module
Initialized；
The data write and compensating module, connect respectively the drive module, scanning signal end and data voltage end, use
Under the control at the scanning signal end, the signal being input into by the data voltage end carries out threshold to the drive module
The compensation of threshold voltage；
The drive module, is also connected with the light emitting control module and the first voltage end, for obtaining threshold voltage
Compensation after, under the control of the first voltage end and the light emitting control module, drive the light emitting module to carry out sending out
Light；
The light emitting control module, be also connected with the light emitting module, enable signal end, second voltage end, secondary signal end and
Tertiary voltage end, at the enable signal end, the second voltage end, the secondary signal end and described 3rd electric
Under the control of pressure side, it is turned on and off the light emitting module.
2. OLED pixel circuit according to claim 1, it is characterised in that the drive module includes storage capacitance and drive
Dynamic transistor；
The first end of the storage capacitance connects the initialization module, data write and compensating module and described
Photocontrol module, the second end connects the grid of the driving transistor；
First pole of the driving transistor connects the first voltage end, the second pole connect the light emitting control module and
The data write and compensating module.
3. OLED pixel circuit according to claim 2, it is characterised in that the initialization module includes the first transistor
And transistor seconds；
The grid of the first transistor connects first signal end, and the first pole connects the first voltage end, and the second pole connects
Connect the first end of the storage capacitance；
The grid of the transistor seconds connects first signal end, and the first pole connects the initial voltage end, and the second pole connects
Connect the second end of the storage capacitance.
4. OLED pixel circuit according to claim 2, it is characterised in that the data write and compensating module include the
Three transistors and the 4th transistor；
The grid of the third transistor connects the scanning signal end, and the first pole connects the data voltage end, and the second pole connects
Connect the first end of the storage capacitance；
The grid of the 4th transistor connects the scanning signal end, and the first pole connects the second pole of the driving transistor,
Second pole connects the second end of the storage capacitance.
5. OLED pixel circuit according to claim 2, it is characterised in that the light emitting control module includes the 5th crystal
Pipe, the 6th transistor and the 7th transistor；
The grid of the 5th transistor connects the enable signal end, and the first pole connects the second voltage end, and the second pole connects
Connect the first end of the storage capacitance；
The grid of the 6th transistor connects the enable signal end, and the first pole connects the second pole of the driving transistor,
Second pole connects the light emitting module；
The grid of the 7th transistor connects the secondary signal end, and the first pole connects the tertiary voltage end, the second pole
Connect the light emitting module.
6. OLED pixel circuit according to claim 5, it is characterised in that the light emitting module includes luminescent device；
The anode of the luminescent device connects the second pole of the 6th transistor, and negative electrode connects the second of the 7th transistor
Pole.
7. a kind of display device, it is characterised in that including the OLED pixel circuit described in any one of claim 1-6.
8. a kind of driving method of OLED pixel circuit, it is characterised in that the driving method includes：
In the initial phase of a frame, control of the initialization module in the first signal end, first voltage end and initial voltage end
Under, drive module is initialized；
Data write and compensated stage in a frame, data are write with compensating module under the control at scanning signal end, by number
According to the signal that voltage end is input into, the compensation of threshold voltage is carried out to the drive module；
In the first frame to nth frame, the glow phase of each frame, light emitting control module enable signal end, second voltage end, the
Under the control at binary signal end and tertiary voltage end, control light emitting module is closed；The luminous rank of each frame after nth frame
Section, the light emitting control module is at the enable signal end, the second voltage end, the secondary signal end and described the
Under the control of three voltage ends, control the light emitting module and open；
Wherein, N is integer, and 1≤N≤5.
9. driving method according to claim 8, it is characterised in that N is equal to 2.
10. driving method according to claim 8, it is characterised in that the initialization module include the first transistor and
Transistor seconds；
In the initial phase of a frame, the first signal end input initialization signal, control the first transistor and the second crystal
Pipe is opened, and the drive module is initialized.
11. driving methods according to claim 8, it is characterised in that the data write includes the 3rd with compensating module
Transistor and the 4th transistor；
Data write and compensated stage in a frame, the scanning signal end is input into scanning signal, control third transistor and the
Four transistors are opened, and to the drive module compensation of threshold voltage is carried out.
12. driving methods according to claim 8, it is characterised in that the light emitting control module include the 5th transistor,
6th transistor and the 7th transistor；
In the first frame to nth frame, the glow phase of each frame enables signal end input and enables signal, controls the 5th transistor
Open with the 6th transistor, secondary signal end is input into the first signal and controls the 7th transistor cutoff, control the light emitting module and close
Close；The glow phase of each frame after nth frame, enables signal end input and enables signal, controls the 5th transistor and the 6th
Transistor is opened, and secondary signal end input secondary signal controls the 7th transistor and opens, and controls the light emitting module and opens.
Priority Applications (3)
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| CN201710124211.XA CN106652903B (en) | 2017-03-03 | 2017-03-03 | A kind of OLED pixel circuit and its driving method, display device |
| US15/781,445 US10923039B2 (en) | 2017-03-03 | 2017-10-25 | OLED pixel circuit and driving method thereof, and display device |
| PCT/CN2017/107624 WO2018157613A1 (en) | 2017-03-03 | 2017-10-25 | Oled pixel circuit and drive method therefor, and display apparatus |
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| CN201710124211.XA CN106652903B (en) | 2017-03-03 | 2017-03-03 | A kind of OLED pixel circuit and its driving method, display device |
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| WO2018157613A1 (en) * | 2017-03-03 | 2018-09-07 | 京东方科技集团股份有限公司 | Oled pixel circuit and drive method therefor, and display apparatus |
| US10923039B2 (en) | 2017-03-03 | 2021-02-16 | Boe Technology Group Co., Ltd. | OLED pixel circuit and driving method thereof, and display device |
| WO2018210086A1 (en) * | 2017-05-15 | 2018-11-22 | 京东方科技集团股份有限公司 | Pixel circuit and driving method therefor, and display device |
| CN107103877A (en) * | 2017-05-15 | 2017-08-29 | 京东方科技集团股份有限公司 | Image element circuit and its driving method, display device |
| CN107331345A (en) * | 2017-07-25 | 2017-11-07 | 武汉华星光电半导体显示技术有限公司 | A kind of pixel compensation circuit and display device |
| US10192489B1 (en) | 2017-07-25 | 2019-01-29 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Pixel compensation circuit and display device |
| WO2019019276A1 (en) * | 2017-07-25 | 2019-01-31 | 武汉华星光电半导体显示技术有限公司 | Pixel compensation circuit and display apparatus |
| CN107481676A (en) * | 2017-09-30 | 2017-12-15 | 上海天马有机发光显示技术有限公司 | A kind of driving method of image element circuit, display panel and display device |
| CN114093326A (en) * | 2017-10-18 | 2022-02-25 | 京东方科技集团股份有限公司 | Pixel circuit and driving method thereof |
| US10665159B2 (en) | 2018-04-18 | 2020-05-26 | Wuhan China Star Optoelectronics Ssemiconductor Display Technology Co., Ltd. | Pixel compensating circuit and pixel compensating method |
| CN108682394A (en) * | 2018-04-18 | 2018-10-19 | 武汉华星光电半导体显示技术有限公司 | A kind of pixel compensation circuit and pixel compensation method |
| WO2020098262A1 (en) * | 2018-11-13 | 2020-05-22 | Boe Technology Group Co., Ltd. | Pixel circuit and driving method thereof, display substrate, and display apparatus |
| CN109087609A (en) * | 2018-11-13 | 2018-12-25 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method, display base plate, display device |
| US11361711B2 (en) | 2018-11-13 | 2022-06-14 | Boe Technology Group Co., Ltd. | Pixel circuit and driving method thereof, display substrate, and display apparatus |
| CN111105749A (en) * | 2020-01-15 | 2020-05-05 | 京东方科技集团股份有限公司 | Pixel circuit, pixel driving method and display device |
| US11087684B1 (en) | 2020-04-16 | 2021-08-10 | Novatek Microelectronics Corp. | Pixel driver and pixel driving method |
| TWI742832B (en) * | 2020-04-16 | 2021-10-11 | 聯詠科技股份有限公司 | Pixel driver and pixel driving method |
| CN112542130A (en) * | 2020-08-17 | 2021-03-23 | 友达光电股份有限公司 | Low-power-consumption pixel circuit and display |
| CN112542130B (en) * | 2020-08-17 | 2023-06-27 | 友达光电股份有限公司 | Low-power consumption pixel circuit and display |
| CN112863436A (en) * | 2021-01-11 | 2021-05-28 | 京东方科技集团股份有限公司 | Pixel circuit, driving method, electroluminescent display panel and display device |
| CN112908245A (en) * | 2021-02-24 | 2021-06-04 | 昆山国显光电有限公司 | Pixel circuit, driving method thereof and display panel |
| WO2023273444A1 (en) * | 2021-06-30 | 2023-01-05 | 京东方科技集团股份有限公司 | Apparatus and method for driving display panel |
| CN113539184A (en) * | 2021-07-20 | 2021-10-22 | 昆山国显光电有限公司 | Pixel circuit, driving method thereof and display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018157613A1 (en) | 2018-09-07 |
| US10923039B2 (en) | 2021-02-16 |
| CN106652903B (en) | 2018-10-23 |
| US20200273410A1 (en) | 2020-08-27 |
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